Carburetor float support



June4, 1940.`

B. MOLLBERG f CARBRETOR FLOAT SUPPORT Filed April so,l 193s Imfenlor lByron lilou/berg.

Patente'd June 4, 1940 PATENT OFFICE Y CARBURETOR FLOAT SUPPORT k ByronMollberg, St. Louis, Mo., assignor to Carter Carburetor Corporation, St.Louis, Mo., a corporation of Delaware Application April 30, 1938, SerialNo. 205,373

6 Claims.

This invention relates to pivotal support means for valve controllingfloats of the type commonly used to control the fuel inlet valve in aninternal combustion engine carburetor.

An object of the invention is to provide substantially simplifiedpivotal supporting means for valve control means of the above type.

Another object is to provide pivotal support for a oat of the above typearranged so that the fioat may be readily assembled and disassembledupon removal of the lloat chamber cover without the necessity ofdisturbing or'removing any other part of the mechanism.

These objects and other more detailed objects hereafter appearing areattained substantially by the devices illustrated in the accompanyingdrawing in which:

Fig. 1 is a sectionall view illustrating part of an internal combustionengine carburetor embodying the invention.

Fig. 2 is a top view of a part of the structure in Fig. 1.

Fig. 3 is a section taken substantially on the corresponding sectionline of Fig. 1.

Fig. 4 is a vertical section showing a part of the structure in Fig. 1,but with the float bowl cover removed.

Fig. 5 is a perspective view showing the float supporting portion of thefloat chamber wall, and

Fig. 6 is a similar view showing the float.

Fig. 1 shows a downdraft carburetor including air inlet horn I mountingchoke valve 2, mixing chamber 3, and outlet portion II flanged as at 5for attachment to the intake manifold (not shown) of an associatedinternal combustion engine. A throttle valve 6 is pivotally mountedbetween the mixing chamber and outlet portion of the carburetor.Adjacent the mixture chamber is a iloat bowl 'I having an aperturedinlet boss 8 receiving a valve seat member 9 and a needle valve I0.Valve Il] is controlled by a tongue II on float I2, the tongue formingpart of the float supporting bracket, generally indicated at I3.`

Fuel is supplied to the mixture chamber through a calibrated oricemember I4, and passage I5, extending upwardly at an angle through jetbar I6 and opening laterally therethrough by. means of ports as at I1.'jThe main fuel passages are air bled by means of a passage I8 openinginto the top of the float chamber, and perforated tube I9.

'I'he outer wall of float chamber 1 is recessed adjacent boss 8, as at20, to form a ledge 2I beneath valve seat member 9. Projecting fromledge 2l are lugs 22, 23 and 24. Float bracket I3 includes side armportions 25, having recesses 26 in the outside edges thereof.

In assembling they float with the carburetor, bracket I3 is insertedinto recess 20 from the top or inner side and recesses 26 are appliedover lugs 22 from the top'thereof. In the assembled position, thebracket arms rest upon lugs 23 which have curved or tapered uppersurfaces forming pivotal supports. Lugs 22 and 23 prevent disassembly ofthe float except by upward movement thereof. l

Cover portion 21 of the float bowl includes an inverted U-shapedprojection 28 depending therefrom on each side of valve seat memberll,as shown in Fig. 3, and with its lower extremities normally positionedimmediately above bracket I3 so as to prevent upward movement thereof.Thus lugs 22 and 23 and element 2B form a stable pivotal support for thefloat which may be readily assembled and disassembled when the cover isremoved without the necessity of rst removing a float supporting pin orother holding means, as has frequently been the case.

As shown in Fig. 4, needle valve I0 normally extends slightly inwardlybeyond the inner exltremity of seat member 9 and in order to remove thevalve seat element, which is pressed into place, a screw driver may beinserted behind lug 24, as indicated, and pressure applied to theexposed end of the valve. This inlet valve construction is more fullydescribed and claimed in my co-pending application, Serial No. 205,372,led April 30, 1938, of which this application is a continuation-in-part.

The invention is not limited to the structure shown but may be modifiedin various respects as will occur to those skilled in the art and theexclusive use of all such modications as come within the scope of theappended claims is contemplated.

I claim:

1. In combination, a float chamber, a port in a wall thereof, a valve insaid port, a float arranged for controlling said valve and having asupporting bracket including a recessed part, lug structure on the wallof said chamber engaging the under side of said bracket and pivotallysupporting the same, and other lug structure on said wall extending intosaid recessed part of said bracket for resisting disassembly of saidbracket from said supporting lug structure.

2. The combination of elements specified in claim 1 further including aremovable cover for said chamber having a member normally positionedadjacent said bracket for preventing disassembly thereof from said lugstructure.

3. The combination of elements specied in claim 1 in which the recessedpart of said oat bracket extends along the inner and side portions ofsaid second mentioned lug structure whereby disassembly of said bracketfrom said lug structure is prevented except by Vertical movement of saidbracket.

4. In combination, a float chamber, a port in a wall of said chamber, avalve in said port, a float in said chamber arranged for controllingsaid valve, a valve engaging bracket on said float having recesses inthe side edges thereof, lug structure on the wall of said chamberengaging the underside of said bracket for pivotally supporting the sameand spaced lugs on said Wall extending into said recesses wherebyassembly and disassembly of said float with said chamber can be effectedonly by upward movement of said bracket relative to said lugs.

5. The combination of elements specied in claim 4 further including acover for said chamber having a member normally disposed above saidbracket for securing the same in position.

6. The combination of elements specied in claim 4 in which said bracketincludes a lip portion for cooperating With said valve.

BYRON MOLLBERG.

